Biometric cryptosystem provides a seamless connection between the biometrics and traditional password, and it represents a new development in the next generation cryptography. Even if the biometric cryptosystem is secure in algorithmic design, it may still be vulnerable to side-channel attack due to the physical leakage. To assess the possible side-channel attack on biometric cryptosystem, a secure biometric cryptosystem is designed and by measuring the energy consumption leaked. The simulation shows that the biometric cryptosystem can be extracted with bits of energy leakages.